The MAT files for the MilDragon are set up for Poser 4 and Poser 5 plugs the bump map into the gradient bump node, which is specifically for .bum files. It doesn't care if the bump file is a jpeg, it still puts it there. You should be able to leave the bump map in the gradient bump node, just adjust the value setting to get results. Applying MAT pose files that have bump maps associated with them will always put the bump map into the gradient bump node. Creating MAT pose files in Poser 5 also requires putting the bump map there, otherwise, it ignores the bump map node and the MAT pose file shows NO_MAP for the bump map. To use a bump map in the bump map node and save it for later use in Poser 5, save the material to the material room. To creat a MAT pose file that can be used in P4, PP, and P5, put the bump map in the gradient bump node before creating the MAT pose file.